WELD COUNTY, Colo. (CBS4) – The trial for a former Ault police officer accused in a deadly road rage crash began Monday.

Blair Jackson is accused in the case. The crash happened on June 1, 2016 on Highway 85 between Platteville and Gilcrest.

READ MORE: Colorado Weather: Omega Block To Help Wildfire Fight With Daily Storms, Cooler Temps

Esteban Moreno Jr., 39, of Evans was killed in the crash.

READ MORE: COVID In Colorado: Outreach Continues To Unvaccinated Residents
Blair Jackson (credit: CBS)

Blair Jackson in court (credit: CBS)

Investigators say Jackson and Moreno were speeding and tailgating each other. They say at one point Jackson cut the other car off, causing Moreno to lose control and crash.

MORE NEWS: 'Going To Take Some Time': Community Gathers To Remember Victims, Heal Together After Olde Town Arvada Shooting

Jackson was off-duty and on his way from work at the time.